PuTTY wish modified-fkeys

summary: Unique codes for modified function/special keysclass: wish: This is a request for an enhancement.difficulty: taxing: Needs external things we don't have (standards, users etc)priority: low: We aren't sure whether to fix this or not.

We occasionally get requests to provide unique escape sequences for
function keys (and other special keys) with more combinations of
modifiers than we currently support (e.g., Fn, Shift+Fn, Ctrl+Fn and
Ctrl+Shift+Fn).

Sometimes it's even suggested what sequences these should send.
(`xterm-keyboard' has some
suggestions, but also claims not to be trustworthy.)